How is temperature controlled by the body (homeostasis) ?

First lets start by acknowledging what is homeostasis and why it is important to control body temperature. Homeostasis is the control of internal environment of the body to keep it relatively constant. Its important to control body temperature as our body relies on proteins called enzymes for chemical reactions in our body. When the temperature is too high or low they do not function to their optimum and therefore is very dangerous. Body temperature is detected by receptors on our skin and in our blood. When the temperature has shifted from what it should be (37 degrees), signals are sent to the thermoregulatory centre in the brain. This will tell our muscles and glands how to act to bring the temperature back. When the temperature is too low: 1) we shiver- as this is our muscle contracting- to product heat via respiration,2) Hair erector glands are contracted so hairs stand up to trap heat between them 3)Blood vessels constrict so that less blood flows through and less heat is lost. When the body temperature is too high: 1)We sweat to allow water on the skin to remove heat via evaporation, 2) hair erector muscles are relaxed, less heat trapped between hair, 3) blood vessels dilate to allow more blood to flow and lose more heat.